-LRB- CNN -RRB- -- Authorities believe they have found the final victim of a deadly landslide in Washington state .

A rain-saturated hillside along the Stillaguamish River gave way on the outskirts of the town of Oso on March 22 .

Authorities announced Tuesday that workers found a body believed to be that of Molly Kristine `` Kris '' Regelbrugge . Local health officials will confirm the identification of the body once it 's recovered .

`` It is a testament to the persistence of the sheriff 's office that today , four months after the slide , we recovered the final victim , '' Snohomish County Executive John Lovick said in a statement .

`` The sheriff 's search and rescue teams are true professionals . I am honored and humbled by their dedication and commitment to this community , '' he said .

Search crews had been digging through deep mud and debris , which was 70 feet thick in some places , to search for the missing .

Including Regelbrugge , 43 people are thought to have been killed in the March slide .

CNN 's Matthew Stucker , Mayra Cuevas and Steve Almasy contributed to this report .

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It 's been four months since a rain-saturated hillside in Washington state gave way

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Search crews have been digging through deep mud and debris

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Forthy-three people are believed to have been killed in the March slide